Combination measuring instrument



May 18 ,1.926. 1,585,563

F. SCHLATTAU COMBINATION MEASURING INSTRUMENT Filed Dec. 51.51924 2 sheets-sheet v1 May 18 1926. 1,585,563

F. SCHLATTAU COMBINATION MEASURING INSTRUMENT Filed Dec. 51 1924 2 Sheets-Sheet 2' gwumlfox Patented May 18, 1926.

UNITED STATES FRANK SCHIJATTAU, F LOS ANGELES, GALIFORNIA.

COMBINATION MEASULRJING INSTRUMENT.

Application iiled December 31, 1924. Serial No. 759,112.

This invention relates to improvements in combination measuring instruments and has as its general object to provide an instrument compactly arranged and adapted to be employed as a level, an angle, a square, u rule, a wire and screw gauge, a caliper gauge, a depth gauge, and a Vernier' protractor.

Another object of the invention is to provide an instrument of the class described embodying a depth gauging blade so mounted that it may be projected to a maximum distance to provide for a wide 'range of measurements and, when not in use, may be adjusted to occupy a position where it will not in any way interfere with the employment oiE the instrument to obtain other i'neasurements.

Another object of the invention is to pro- Vide a novel form of caliper gauge which may be adjusted in a manner similar to the depth gauge, and to provide Vnovel means for holding the caliper gauge in its various positions of adjustment.

Another object of the invention is to provide rnovel means embodying a novel arrangement of scales adapting the instrument to be employed as a Vernier protractor.

In the accompanying drawings:

Figure 1 is a perspective View of the instrument embodying the invention adjusted for use as a caliper gauge.

Figure 2 is a View in elevation of the instrument adjusted for use as an angle or as a Vernier protractor, or as a screw gauge,

either as desired.

Figure 3 is a side elevation of the instrument looking at that side opposite the side displayed in Figure 2.

Figure 4 is a Vertical transverse sectional View on the line 4--4 of Figure 3, looking in the direction indicated by the arrows.

Figure 5 is a similar View on the line 5-5 of Figure 3, looking in the direction indicated by the arrows.

Figure 6 is a Vertical longitudinal sectional view taken substantially on the line 6-6 of Figure 4, looking in the direction indicated by the arrows.

Figure 7 is a fragmentary View in elevation, illustrating the manner in which the instrument may be employed as a depth gauge.

The instrument embodying the invention comprises a air of arms indicated in general one by t e numeral 1 and the other by the numeral 2, and the said arm 1 is 'formed in one face with a recess 3 which extends longitudinally thereof from the outer end of the arm and inwardly from one longitudinal straight edge of the arm, indicated by the numeral 4, the side wall of the re-v cess being indicated by the numeral 5 and being parallel to the other longitudinal straight edge of the arm 1, indicated by the numeral 6. The arm at its inner end is formed with spaced ears 7 and v3, the ear 7 being substantially semi-circular and occupying the same plane as the recessed or thinner portion 3 of the arm and being integral with the said inner end oi this portion of the arm. The ear 8 occupies a plane parallel to and spaced from the ear 7 and is of approximately circular form and concentric to the ear 7 and integral with the inner end of the arm 1 at that portion which is intact or, in other words, which is not recessed. The arm 2 is provided at its inner end with an approximately circular ear 9 one side of which is liush with the under side of the arm and the said ear is of less thickness than the arm so that at the inner end of the arm there is provided an arcuate shoulder indicated by the numeral 10, The ear 9 of the arm 2 is iitted between the ears 7 and 8 of the arm 1, and a bushing 11 fitted through registering openings formed in the several ears, the bushing being provided at one end with a head 12 engaging the under side of the arm 1 and being interiorly threaded, as indicated by the numeral 13, to accommodate the shank of a set screw 14, the head 15 of which screw bears against the upper face of the ear 8, as clearly shown in Figure 5 ot' the drawings, the two arms being, in this manner, pivotally connected for relatively angular adjustment and being adapted to be held in Various positions of relative adjustment by tightening the said screw 14. At this point it will be understood, and particularly by reference to Figures 1 and 4 ot the drawings, that the arm 2 is adapted to be swung or folded to position lying wholly within the recess 3 and filling the said recess and with one of its straight longitudinal edges, indicated by the numeral 16, abutting the wall 5 of the recess 3, the other longitudinal straight edge of the arm 2, indicated by the numeral 17, at such time being in registration with the straight edge 4 of the arm 1.

The arms 1` and 2 are provided, diametrically opposite the axes oit their pivot ears, with shoulders indicated respectively by the numerals 1S and 19, and it will be evident that when the arms are swung to full open position, these shoulders will mutually abut and the straight edges t' and i7 of the arms 1 and 2 will he in true alinement. The upper taces oi the arms are therefore conveniently provided along* their saidlstraight edges, with a linear scale indicated by tue numeral Q0 and havingv a. length, i'or er;- ainple.. et one foot, one-half et the scale being arranged upon the arm l. and the other haliu ol' the scale upon the arm 2. 'l`hereitore, when thearms are in alinenlent7 the instrument may be employed as a foot. rule lor the purposesof measurement, or it may be employed as a straight edge in laying` out lines of given lengths. Likewise, when the arms are folded, as in Figure 1, either of the straight edges G and 17 may be similarly employed. llhe scale 20, being a lineary scale, is divided into inches and fractions o'lf inches1 and the sub-division elt the inch divisions may be carried to any desired extent. A similar linea-r scale 2l is provided upon the recessed -face ot the arm l along` the straight edge 4t. In like manner, a linear scale is provide-d upon the upper lfaoe of the arm 2 along the straight edge 1G of the said arm.

rlhel recessed portion et the arm 1 is termed with a-slot indicated by the numeral 23, and the walls ol? this slot, indicated by the numerals 2st and 25, extend along' diverging lines, the slot as a whole extendinglongitudinally ot the said portion oli' the arm 1. A diameter scale 26 is arranged upon the upper ilacc ot the said portion oitthe arm along the wall 25 ot' the slot, anda Iscrew gauge scale 2T is similarly arranged upon the said face et' the said portion et the arm along' the wall olz the slot. gauge scales 28 and 2.() are. arrangjed upon the under 'tace oli' the arm 1. respectively7 alone; the walls 24 and 25 yet the slot as clearly shown in Figure 3 o'l the drawings. The several scales 2G1 27, 28 and 29 `are differently calibrated lor deterniining` the diameter oi' wire, rods, nails, screws, and the like according to adeterminateand selected scale.

The caliper gauge is indicated in general by the reference numeral 30 andthis gauge comprises a head 31 which is ot `a length corresponding; to the width of the arm 1 and ot' a thickness equal to the major thickness ot the said arm- A blade 32 extends at one side ot the head 31 in close proxiniity to one end of the head and this blade is of lat torni and is sli dably adjustable in a rectangular socket 33 formed in and extending' longitudinail)T of the thicker portion of the arm 17 as best shown in Figure 6 of the lili re drawings. The arrangement of the blade 32 and head "31 of the caliper gauge is such that in the sliding' adjustment et the blade 3:2 in the socket 33 of the arm l, that side et' the head 3l from which the blade extends will be sini/ced a greater or less distance from and presented directly toward the end of the arni l luid likewise the arm 2, when the arms are Vfolded as shovfn in Figure i. 'l`hus, the oppffing sui-'laces ot the head -Si and ar i and Ei constitute the work-ei ing;` sur aces oi the gauge, and the blad provided with a scale 23d. the nini which, in the zuliiif=st..\l'icnt ol the blade will regir-ster with the end oi the arm 1 as to indicate the distance between thc opposing surlaces of the head, 31 and the arms 1 and 2, and thereby indicate the diameter or thickness olf a piece of work to which the gauge is applied tor the purpose ol. measurement. ln order that the caliper gauge may be maintained in any position to which it may be adjusted.. and without the e1nploynient ol any mechanical means tor this purpose, as lior example a set screw, the blade 32, which is ot metal, is vformed in its inner end with a notch 85, and the blade at o: Y. side o i the notch is sprung outwardly so as to provide a more or less resilient triction nose BG which slides Vtrictionally along` the wall of the socket 33 in the adjustu'ient olZ the blade. The end et the nose and the end et the blade at the opposite side oi the notch, are both rounded as at 37 and 38 so as to provide `for ready insertion of the blade.

Preferably, one tace oi" the head 3l will he provided with a short linear scale 39 ci@ tendiney alone` the outer edge ot the head and this scale will be` Ot a length of an inch or more and the sub-divisionsy of the scale will be in thirty-seconds o't an inch. it, similar scale l() is provided upon the opposite tru-e el the head 31 and its sub-divisions repre sent sixty-fourths ot an inch.

The depth gauge et the instrument is indicated in general hy the numeral l0 and the same comprises a bladey 4-1 which is slidabljv adjustably mounted in a longitudinally extending rectangular socket 4t2 termed in the arm 2, the said socket openinrj through the outer end ol.E the said arm. The arm is likewise formed longitudinally ot' one wall ol" the socket 4Q, with a slot 43, and the blade 11 is provided at its end which is next adjacent the pivot 'for the arms 1 and 2, with a shallow boss 44 or' vrectangular torni, which boss works in the slot 43. A set screw 45 is provided in connection with the blade el and has its shank L6 threaded through an opening 4J? formed in the said blade l1 and its boss 44. the end et the set screw shank be ing adapted to bear against the wall et the socket 42, when the screw is tightened. for the purpose of holding the blade h/1-1 in any 'gli position to which it may be adjusted. rlhe head 31 of the caliper gauge is formed with a slot 4S opening through its inner and outer edO'e faces and so positioned and of such dimensions as to register with the open outer end of the socket 42, so that the blade 4l may be projected through and beyond the head. 3l, as illustrated in lf|`igure T of the drawings, in making depth measurements, the blade being provided with a scale 49 for registration with the outer edge face of the head 3l to indicate the extent of projection of the blade beyond the said head, it being` understood by reference to .Figure 7, that the edge face of the head is designed to be disposed against the surface in which the opening or recess, or other cavity, the depth of which is to be measured, is located, and that the blade is to be projected into the cavity until its end strikes the bottom of the cavity, whereupon the set screw may be tightened to secure the blade in its position of :uljustmcnt until the necessary reading is taken.

lu order that the instrument may be employed as a level, the arm 2 is formed in its straight edge 17 with a recess 50 closed by a cap plate 5l. and housinga spirit tube 52, the plate having a slot 53 therein, through which the bubble in the tube may be observed.

lhe face of the ear 8 of the arm l is provided with a protractor scale 54, each division of which represents live degrees of angular measurement, the scale extending along the margin of the said face as best shown in Figures l and 2 of the drawings. A.. vernier scale 55 is provided upon the face of the arm 2 and extends along the shoulder l0 and consequently in position for registration of its divisions with the divisions of the protractor scale 54. The ver-nier scale 55 .includes a zero mark 56 and the divisions of the scale are each a half of a degree less than the divisions of the protractor scale 54. Preferably, the scale 55 has ten divisions so that the length of this scale is equivalent to forty-five degrees on the protractor scale. At this point it will. be understood that the protractor and vernier scales may be employed in conjunction with each other where the instrument it to be employed as Vernier protractor, and that where it is to be employed merely as an angle in plotting` angles or inclines, or measuring angles or inclinations, the zero mark 56 of the vernier scale may be read in conjunction with the protractor scale 54.

It will be understood that when the instrument is folded, the arms of the instrument may be held against relative swinging movement by loosening the set screw 45 and sliding the depth gauge blade 4l outwardly until the end of the blade engages in the slet 48, and then tightening said set screw.

' Having thus described the invention, what l claim is:

l. A measuring instrument comprising a pair of pivotally connected arms, a caliper gauge comprising` a blade slidably adjustably xnounted in one of said arms and a head supported by the outer end of the blade and confrontingthe free ends of the arms, the. said head having a slot therein, and a depth gauge comprising a blade slidably carried by the other arm and adjustable to project through the slot and beyond the outer side of the said head.

2. A measuring instrument comprising a pair of pivotally connected arms, one of said arms having a longitudinal socket formed therein, a blade slidably adjustably mounted in said socket, a head supported at the outer end of the blade and having a side confronting the free ends of the arms whereby to constitute a caliper gauge, the said head having a slot therein, the other arm having a longitudinal socket formed therein, a depth gauge comprising a blade slidably adjustably mounted in the socket and adjustable to project through the said slot and beyond the opposite side of the said caliper gauge head. and means for holding the depth gauge blade in positions of adjustment. the said depth gauge blade, when adjusted to project at its outer end into the slot in the caliper gauge head, constituting means for preventingunfolding of the arms about their pivot.

3. A. measuring instrument comprising an arm having a longitudinal socket formed therein and opening through one end of the arm` the said end of the arm being at right angles to the line of extent of the socket, the arm being formed in one face with a longitudinally extending slot communicating with the socket. and a depth gauge blade slidably adjustably mounted in the socket and having a scale for registration with said end of the arm, the said blade having a boss slidably engaging in the slot` and a set screw having its shank threaded through the boss and the blade and adjustable to bear at its end against the opposite wall of the socket to that in which the slot is formed.

In testimony whereof I aiiiX my signature.

FRANK SCHLATTAU. [n s] 

